实际题目往往需要先做一步转化（如循环数组、链表转数组、先排序再栈），再套上面模板即可。
this.stack.pop(); // 弹出的索引对应的价格≤当前价格，无保留意义
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Reporting by Chance Townsend, Caitlin Welsh, Sam Haysom, Amanda Yeo, Shannon Connellan, Cecily Mauran, Mike Pearl, and Adam Rosenberg contributed to this article.
void page_return(void *page,unsigned long long bytes) {
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